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There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.

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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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If all the neurons in the human body were lined up, they would stretch more than 600 miles.

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Your chance of developing a kidney stone is 1 in 10. In recent years, approximately 3.7 million people in the United States were diagnosed with a kidney disease.

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